Yarn winding device



Dec. 4, 1951 v w. KEIGHT 2,577,131

YARN WINDING DEVICE v Filed July 22, 1948 N N INVENTOR. ALBERT' W.KEIGHE AT ORNEYS Patented Dec. 4, 1 951 YARN WINDING DEVICE Albert W.Kelght, Cumberland, Md., assignor to Oelanese Corporation of America, acorporation of Delaware Application July 22, 1948, Serial No. 40,100

6 (llaims. (Cl. 242-435) This invention relates to the winding of yarnsinto packages, and relates more particularly to a novel traversingmechanism adapted to be employed in connection with yarn twisting andwinding apparatus whereby double-tapered yarn packages may be woundwithout the necessity for giving reciprocating motion to the revolvingspindle upon which the yarn package support rests.

Double-tapered yarn packages have heretofore been formed bysuperimposing two motions on the guide directing the yarn on to thebobbin, namely, an up and down traversing or chasing motion and a slowprogressive feed or lift for building the package. The progressive feedor lift usually moves only once during the filling of the bobbin or yarnpackage support. Yarn packages wound in this manner cannot be dressedeconomically to remove any soiled yarn on the bottom layers of thepackage since the removal of the bottom layers necessitates completeback winding to clean up the yarn. Certain mechanisms have been providedfor superimposing a builder motion on the normal chaser or traversemotion wherein the spindle is moved. However, these mechanisms are of aconsiderable degree of complexity and present appreciable servicingefilcient design adapted to cooperate with the ring.

rail of a ring twisting and winding device for producing a traversestroke having a builder motion superimposed thereon so as to enablesatisfactory yarn packages of a double-tapered cone shape to be wound.

Another object of this invention is the provision of means comprising atraverse mechanism for a twisting and winding device having a pluralityof reciprocating ring rails wherein the use of counterbalancing weightsis eliminated.

Other objects of this invention, together with certain details ofconstruction and combinations of parts, will appear from thefollowing-detailed description and the accompanying drawing.

In the drawing wherein a preferred form of my invention is shown, thefigure is a perspective view of a winding and twisting device embodyingmy invention, certain conventional elements being omitted from thefigure in the interest of clarity.

Like reference numerals indicate like parts throughout the drawing.

Referring now to the drawing, yarns I, coming from any suitable sourceof supply. such as -or cables I8.

a metier or spinning cabinet (not shown), pass downwardly and arethreaded through travelers 2 each mounted on spinning rings 3 suitablyattached to ring rails 4 and 5. The ring rails each carry a plurality ofspinning rings 3 suitably spaced thereon so that multiple windingoperations may be carried on. Yarns l, after passing through travelers2, are each taken up on rotating bobbins 8 and I. The bobbins are seatedon driven spindles of conventional construction (not shown) which arerotated at high speed in the usual manner, as by a belt or beltsengaging the whorl of the spindles. The rotation of bobbins 6 and 7forms a plurality of yarn packages, the yarn windings 8 of which aresuitably distributed along the barrel of the several bobbins 6 and I bya vertical reciprocating traverse or chaser motion imparted to ringrails 4 and 5. The vertical reciprocation of ring rail 4 iscounterbalanced by the reciprocation of ring rail 5 which is operativelyconnected thereto in a manner which will hereinafter be described indetail.

The traverse or chaser motion of each of ring rails 4 and 5 is impartedthereto by the rotation of heart-shaped cam 9 keyed to a cam shaft II)which is driven by suitable means (not shown). The cam 9 acts on a camfollower ll rotatably mounted on a pin l2 carried in a rocker arm l3which is pivotally mounted at I4 by means of any suitable elementattached to the machine frame (not shown). The upper end of rocker armI3 is provided with a slot it having a pin I! set therein to which areattached traverse chains Traverse cables [8 are trained around pulleysl9 which are fixed to a pin 20 carried by a rocker arm 2| which isbifurcated to form fingers 22 in which the pin 20 is rotatably mounted.Rocker arm 2| is pivoted at 23 in any suitable manner. Pin 20 also actsas a cam follower for an auxiliary cam 24 keyed to a driven shaft 25which is geared to main camshaft l0 through a suitable gear reductiondevice (not shown). The functions of auxiliary cam 24 will be describedhereinafter in detail.

The traverse cables l8 are anchored at their opposite ends in a clamp 26mounted on parallel rods 21 and and 28 as by set screws 29. Parallelrods 21 and 28 are slidably mounted in suitable guide bearings (notshown). Mounted on red 28 are a plurality of brackets 30 and 3|,brackets 30 being fixed thereto by said screws 32 and brackets 3| beingfixed to said red by set screws.

33. Anchored in brackets 30 are cables 34 which are trained overrotatably mounted pulleys 35 and are attached to feet 36 carried bylifter rods 31 which are fixed to ring rail 4. A pair of cables 38 areanchored at one end in brackets 3|, are trained over rotatably mountedpulleys 39 and are attached to feet 48 carried by lifter rods 4| whichare fixed to ring rail 8.

'The rotation of heart-shaped cam 8 which is.

driven by main camshaft l cooperates with cam follower H to cause arm I3to be rocked about pivot l4. When'the rotation of cam 9 causes arm l3 tomove to the right, for example, as shown in the drawing, traverse cablesl8 cause clamp 26 together with parallel rods 21 and 28 to be moved tothe .left. Since brackets 30 are fixed to rod 28, these brackets willalso move to the left and cause cables 34 to raise feet 38 and lifterrods 31. This action raises ringrail 4 and the distance through which itrises constitutes the upward traverse stroke of ring rail 4 whichdistributes windings 8 on bobbin 6. Since brackets 3| are alsosimultaneously drawn to the left, cables 38 allow feet 40 and lifterrods 4| to fall and to lower ring rail 5 a distance equal to thedistance through which ring rail 4 rises. This motion constitutes thedownward traverse stroke of ring rail 5 and distributes windings 8 onbobbin I. Since ring rails 4 and 5 are in a counterbalanced relationshipfurther rotation of cam 9 allows rocker arm l3 to reverse its movementthus allowing ring rail 4 to fall and execute the downward ring railtraverse stroke while ring rail 5 simultaneously rises to execute itsupward traverse stroke. Each traverse stroke is uniform and the distancethrough which counterbalanced ring rails 4 and 5 move is fixed by theperiphery of cam 9.

Without a suitable builder motion superimposed on the traverse motion ofring rails 4 and 5 described above, the yarn windings form a yarnpackage of cylindrical shape. Such a package is quite undesirable sincethe traversing of the heavy ring rails cannot be effected with enoughspeed to yield a yarn package having windings which are angledsufficiently to produce a coherent and compact package wherein the yarnwindings resist sloughing off or turning at the ends. Thus, it isnecessary that the path of the traverse stroke produced by the rotationof cam 9 be progressively advanced up and down bobbins 6 and I by asuitable builder motion so that a double-tapered yarn package havingwindings so distributed that a package of satisfactory physicalcharacteristics may be formed.

The desired builder motion is produced by the rotation of cam 24 whichis mounted on and rotated by camshaft 25, which is suitably geared tocamshaft l0 through a gear reduction device, as indicated above. Cam 24is rotated at but a fraction of the speed at which cam 9 is rotated.Thus, as cam 24 slowly rotates in contact with cam follower pin 20, itslowly rocks auxiliary rocker arm 2| about pivot 23. This motiongradually increases and decreases the distance between pulleys l9 andpin 11 in rocker arm l3 and thus increases and decreases the effectivelength of traverse cables 18 therebetween. As the effective length oftraverse cables l8 between pulleys l9 and pin I1 is gradually increased,the uniform traverse stroke of ring rails 4 and 5 imparted by therotation of cam 9 is gradually advanced upward along bobbin 6 anddownward along bobbin 1. Conversely, when the effective distance betweenpulleys l9 and pin I1 is gradually decreased by the rotation of cam 24,the uniform traverse stroke of ring rail 4 is gradually lowered alongbobbin 6 and gradually raised along bobbin 1.

My novel apparatus builds a very desirable double-tapered yarn packagewithout employing a traversing spindle and without any complex gearing.Since ring rails 4 and 5 are so arranged as to counterbalance eachother, the problem of -deadweight is satisfactorily eliminated, thusperpair of countermoving ring rails for winding yam onto said yarnsupports, of means for traversing each of said ring-rails in opposed,counterbalanced relationship to produce a chaser motion with a traversestroke of uniform length, and means for superimposing a builder motionalternating in direction on each of said chaser motions, so that thepath of the uniform traverse stroke of one ring rail relative to a yarnsupport is progressively raised while the path of the uniform traversestroke of the other ring rail relative to a yarn support issimultaneously and progressively lowered.

2. In a device for producing yarn packages. the combination withrotating yarn supports and a pair of countermoving ring rails forwinding yarn onto said yarn supports, of means including a driventransverse cam and a pivoted rocker arm cooperating therewithoperatively connected to said ring rails for traversing each of saidring rails in opposed, counterbalanced relationship to produce a chasermotion with a traverse stroke of uniform length, and means including asecond cam rotating in timed relationship with the traverse cam andcooperating with a cam follower operatively connected to the ring railsand adapted to be moved by the second cam toward and away from thepivoted rocker arm for superimposing a builder motion alternating indirection on each of said chaser motions, so that the path of theuniform traverse stroke of one ring rail relative to a yarn support isprogressively raised while the path of the uniform traverse stroke ofthe other ring rail relative to a yarn support is simultaneously andprogressively lowcred.

3. In a device for producing yarn packages, the combination withrotating yarn supports and a pair of countermoving ring rails forwinding yarn onto said yarn supports, of means for traversing each ofsaid ring rails in opposed, counterbalanced relationship to produce achaser motion with a traverse stroke of uniform length including adriven traverse cam and a pivoted rocker arm cooperating therewithconnected to said ring rails by flexible traverse cable means anchoredat one end in said rocker arm, and means for superimposing a buildermotion alternating in direction on each of said chaser motions includinga second cam rotating in timed relationship with the traverse cam andcooperating with a cam follower carrying a pulley around which theflexible traverse cable means pass, which cam follower and pulley areadapted to be moved by the second cam toward and away from the pivotedrocker arm whereby the mean distance between said pivoted rocker arm andpulley is progressively decreased and increased so that the path of theuniform traverse stroke of one ring rail relative to a yarn support isprogressively raised while the path of the uniform traverse stroke ofthe other ring rail relative to a yarn support is simultaneously andprogressively lowered.

4. In a device for producing yarn packages, the combination withrotating yarn supports and a pair of countermoving ring rails forwinding yarn onto said yarn supports, of means for traversing each ofsaid ring rails in opposed, counterbalanced relationship to produce achaser motion with a traverse stroke of uniform length including adriven traverse cam and a pivoted rocker arm cooperating therewithconnected to said ring rails by flexible traverse cable means anchoredat one end in said rocker arm and at the other end in a clamp adjustablyfixed to at least one reciprocating, slidably mounted rod operativelyconnected to the ring rails, and means for superimposing a buildermotion alternating in direction on each of said chaser motions includinga second cam rotating in timed relationship with the traverse cam andcooperating with a cam follower carrying a pulley around which theflexible traverse cable means are trained, which cam follower and pulleyare adapted to be moved by the second cam toward and away from thepivoted rocker arm whereby the mean distance between said pivoted rockerarm and pulley is progressively decreased and increased so that the pathof the uniform traverse stroke of one ring rail relative to a yarnsupport is progressively raised while the path of the uniform traversestroke of the other ring rail relative to a yarn support issimultaneously and progressively lowered. 5. In a device for producingyarn packages the combination with rotating yarn supports and a pair ofcountermoving ring rails for winding yarn onto said yarn supports. ofmeans for traversing each of said ring rails in opposed, counterbalancedrelationship to produce a chaser motion with a traverse stroke ofuniform length including a driven traverse cam and a pivoted rocker armcooperating therewith connected to said ring rails by flexible traversecable means anchored at one end in said rocker arm and at the other endin a clamp adjustably fixed to at least one reciprocating, slidablymounted rod, brackets 'adjustably mounted on one of said reciprocatingrods. and flexible lifter means connecting said brackets to ring raillifter rods. and means for superimposing a builder motion alternating indirection on each of said chaser mo tions including a second camrotating in timed relationship with the traverse cam and cooperatingwith a cam follower carrying a pulley around which the flexible traversecable means are trained, which cam follower and pulley are adapted to bemoved by the second cam toward and away from the pivoted rocker armwhereby the mean distance between said pivoted rocker arm and pulley isprogressively decreased and increased so that the path of the uniformtraverse stroke of one ring rail relative to a yarn support isprogressively raised while the path of the uniform traverse stroke ofthe other ring rail relative to a yarn support is simultaneously andprogressively lowered.

6. In a device for producing yarn packages, the combination withrotating yarn supports and a pair of countermoving ring rails forwinding yarn onto said yarn supports, of means for traversing each ofsaid ring rails in opposed, counter-' balanced relationship. wherein onering rail rises as the other falls to produce a chaser motion with atraverse stroke of uniform length including a driven traverse cam and apivoted rocker arm cooperating therewith connected to said ring rails byflexible traverse cable means anchored at one end in said rocker arm andat the other end in a clamp adjustably fixed to at least onereciprocating, slidably mounted rod, brackets adjustably mounted on oneof said reciprocating rods and flexible lifter means passing overpulleys connecting said brackets to ring rail lifter rods, and means forsuperimposing a builder motion alternating in direction on each of saidchaser motions including a second cam rotating in timed relationshipwith the traverse cam and cooperating with a cam follower carrying apulley around which the flexible traverse cable means are trained, whichcam follower and pulley are adapted to be moved by the second cam towardand away from the pivoted rocker arm whereby the mean distance betweensaid pivoted rocker arm and pulley is progressively decreased andincreased so that the. path of the uniform traverse stroke of one ringrail relative to a yarn support is progressively raised while the pathof the uniform traverse stroke of the other ring rail relative to a yarnsupport is simultaneously and progressively lowered.

ALBERT w. KEIGHT.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS

